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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A224521 Numbers a(n) with property a(n) + a(n+5) = 2^(n+5) - 1 = A000225(n+5).

Table of values

n a(n)
0 0
1 1
2 3
3 7
4 15
5 31
6 62
7 124
8 248
9 496
10 992
11 1985
12 3971
13 7943
14 15887
15 31775
16 63550
17 127100
18 254200
19 508400
20 1016800
21 2033601
22 4067203
23 8134407
24 16268815
25 32537631
26 65075262
27 130150524
28 260301048
29 520602096
30 1041204192
31 2082408385
32 4164816771
33 8329633543

List of values

[0, 1, 3, 7, 15, 31, 62, 124, 248, 496, 992, 1985, 3971, 7943, 15887, 31775, 63550, 127100, 254200, 508400, 1016800, 2033601, 4067203, 8134407, 16268815, 32537631, 65075262, 130150524, 260301048, 520602096, 1041204192, 2082408385, 4164816771, 8329633543]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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